Insulator.



L?. Da HILLIARD, 3E. & C. E. PARSONS. INSULATOR.

PFLIUATION FILED JAN. 29, 1908. 1,0;1 5,229. Patented m1161912,

UNITED STATES JOHN` D. HILLIA PATENT OFFICE RD, an., Ani) CHARLES E.' PARSONS, or .GLENs FALLS, NEW YORK,l

' ASSIGNORS T0 J. E. WAY, OF YORK, N. Y.

INSULATOR.

Specification of Letters Patent.

limamteu Malaisia.'

'Application led January 29, 1906'. Serial No. 298,533.

To alt whom it mag/concern;

Be it known that we,'JoHN D. HILLIARD,4 Jr., and CHARLES El PARSONS, citizens of the United States, residing at Glens Falls, in the county of WJarren andy State of New York, have invented a certain new and .useful Improvement in Insulators, of which the followingv is a specification, reference being had drawing. y

Our invention relates to insulators and more especially to that type of insulators employed for high potential circuits, long distance transmission linesand the like.

The object ofthe invention is to providel an insulator for high voltage transmissionl v therein to'the accompanying lines which will have the mechanical-stresses applied longitudinally instead of laterally l as with the pin supported insulato1*ivhich willl be -cheap to manufacture, and which will be able to carry practically an unlimited potential without danger.

Heretofore, the typical insulator' for high voltage transmission lines has been oo nstructed of a series of petticoated shellsj mounted over an iron or wooden pin held upon a cross-arm. As' the metal/pini'is in (every case in contact with thev cross-arm, the condenser'capacity of such an insulator is considerable and if high electrostatic stress be applied to a .thin section of the porcelain,

a puncture is inevitable.. In the case of a;

wooden pin, it is bouncL to take moisture from the cross-arm with which it is'in contact and from the surrounding air, and` under high voltage'the destruction of the pin is probable, due to burning by static leakage. Inasmuch as volt-age must continuallyI increase with the increase of distance trans# mit-ted, aV new type of insulator has been foundnecessary, in order to stand the mechanical and electrical stresses.

4Further objects of the invention will bev apparent to those versed in the art when the` specicationis read in connection with the accompanying sheet of drawing which forms a part of this application and in which: i

Figure 1 is a side elevation.v Fig 2 f: longitudinal section thereon', and Fic. 3.a transverse section` on the line a of li'ig. 2

Vlooking in the Ydirection indicatedV by the arrowsiY v Referring more especially to the drawing, '1 represents a woodencore which has prefy.. been impregnated with resin' or a similar compound so as torender itnioisture and air proofv and which is corrugated throughout lits entire length as indicated at2 so as to furnish a good holding surface for a cement 5 preferably composed of snlfur and powdered glass which not only forms a strong and tough cement but is also possessedof high insulating qualities. Surrounding the wooden Core l and held by the" sulators et which preferably havev their ends closed so as to fully insulate the ends of the core.

yincreased-inA number so as to provide'p dewhatever. These insulators are corrugated -along'ltheir interior and exterior'surfaces holding surfaces.'

, The porcelain or tile member/"G is slipped over the bottom insulating member l' and sjecured thereto by the cement 5L This member centto the headof thebottom insulator-land is also l'irovided withapetticoatS of the usual construction. Extending at anobtuse angle to the line of the petticoat S. and lying paralof the member 6, which offset vforms a shoul-V derlO. y Each outer insulatorvwith its petticoat 8 and flangev `9 has also a Han'ge 1l insulatorsfl is surrounded b v the 'llange E) of the nextinsulator and vapproaches the shoulderl l0 of the insulator below. After a sullicient number of thesepetticoated insulators', bearing the saine relation to oml an- 95 tofthe cylindrical head of insulator l, and` 100 sides which extend down from the' head and merge into the petticoat This insulator is also provided with a depending flange 11 forming a `continuation of 'the sides and next below.' These petticoatejd ,insulators cement 3 are porcelain or tile cylindrical in- 65 These cylindrical porcelain insulz'itors` 4 may be surrounded by other sm'nlar msup l lators which, 1f necessity required, could be, 70

vice that would withstand-any line potenti-al A so that the bodies of cement may have good.

6 is provided with a head T which lies adja- V80 lel with the'insulator 4, is an 11p-standing g5. flange 9 slightlyoitset from the main luid-yf' which as it is slippedvover the cylimlrlcal surrounded bythe flange 9 of the insulator l,105

are all` corrugated upon their interior suri face and-the flanges 11 are also corrugated Y upon their -exterior surfaces fso as to ap` proximately mate with the corrugation's lon 110 i insulator.

' fan eye 15, 'the upper one being intended vfor engagement by a hook-orv ring suspended *froin'ja cross arm, and the lower one'iior at- T tac'linent to the conducting wire or cable turing point. This cement is likewise wat-er-' proof. i

Secured upon the opposite end members 6 and l2 areiron' caps 14 each provided with by v.means of any suitable bandfhook 'or hanger.

By suspending this insulator.v from its support, una hoo/k,l wire or equivalent Adexvice,fand then swinging the cable below the insulator, the latter.I has free lateral motion 1 in all directions, therefore the stress of the the strain.

cable upon it is always direct, and as the vindividual insulator shells. of which it is built upare mechanically separate romeach ether, and only connected' throughthe ce: ment by which they are secured upon the wooden core, this core -orplug will receive Having thus describedv our invention, what we claim and desire to secure by Letters-Patent is l 1. An insulator comprising a cdr-e', tubular insulating members surrounding said core and cemented thereto, a plurality Vof nested insulators cemented to said tubular members, each of said nested insulators provided with an annular flange adapted'to overlap a lcomplementary flange on the next succesding insulator, and cap insulators for the en s. y 2.' An insulator comprising a core, tubular insulating members surrounding said core and cemented thereto, a plurality 'of nested insulators cemented to said tubular members,

Ieachiof saidnested insulators provided with an' annular flange adapted to overlap a comlementary flange` on the next succeeding insulator, capjinsulators .for the ends, and

means connected to the ycap insulators for suspending the entire structure and thereby flexibly supporting a conductor.

3. An insulator ormedojt' a plurality of vseparate elements or shells, 'with the space between them' filled with material comprising in part a'solid cement to give strength and in part a viscous insulating material as ozocerite, s'tearic acid and resin to give insulation, the latter being held i'n place by .the said cement.

V4t. 'A built-up insulator for high voltage transmission lines comprising av treated wood core, cup-shaped insulating shells surrounding said -core and inclosing the'oppo 6.. A builtup, st-rain insulator for high tension transmission lines comprising a treated wood 'core from which all moisture hasy been extracted, a pair of cupshaped insulating shells inclosing said corea-plurality of annular petticoated vinsulating shells surrounding and inclosing said cup- 'shaped shells, cement containing sulfur and a vitreous material between the core and the cup-shaped shells, and also between the latlter Vand the petticoated shells, a cement composed of soft, resilient or viscous material such as o zocerite, stearic acidand resin between the individualshells, and a pair of metal caps carrying att-aching means cei mented over the end shells. y 7. A suspension insulator comprising a core adapted to resist tensional strains, insulating shells completely inclosing and cemented over and upon said core, a plurality of vpetticoats, formed upon said shells and carried intermediate of the ends of tliecore, and attaching means secured upon said ends. In testimony whereof we have affixed our signatures in presence of two witnesses. JOHN D. HILLIARD, JR. lCI'LISLRILES E; PARSONS. Witnesses 2,4 C; L'. Snow,

. WM. B. SMITH, Jrl

Copies-of this patent may be obtained {o rve cents each,"by addressing thel Commissioner o'f Patents,

Washington, D. (t. 

